Messages in this thread | | | Date | Mon, 20 Apr 2015 14:41:31 -0700 | Subject | Re: [PATCH 16/24] link_path_walk: kill the recursion | From | Linus Torvalds <> |
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On Mon, Apr 20, 2015 at 2:32 PM, Al Viro <viro@zeniv.linux.org.uk> wrote: > > A kilobyte would suffice for 32 levels. _IF_ we go for "lift the restrictions > on nesting completely", sure, we want to switch to (on-demand) dynamic > allocation.
And no, we will *never* lift the recursion limit. Not for 1kB, not for 1MB. Never.
Because it's a latency and DoS issue too. We need to react well to true loops, but also to "very deep" non-loops. It's not about memory use, it's about users triggering unreasonable CPU resources.
Linus
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